为探寻有效的高强低模医用钛合金制备方法，采用机械合金化方法制备了不同Fe 含量的( Ti_{69. 7}Nb_{23. 7}Zr_{4. 9}Ta_{1. 7} ) _{100 －x}Fe_x非晶/纳米晶合金粉末，随后采用放电等离子烧结－非晶晶化法得到了高强低模的超细晶钛基复合材料． 结果表明: ( 1) 机械合金化过程中，Fe 含量对合金的非晶形成能力影响显著，文中实验条件下，只有当x 增大至10 时才能形成全非晶相的非晶粉末; ( 2) Fe 含量也明显影响合成的块体钛合金的力学性能，合成的不同Fe 含量合金中，只有( Ti_{69. 7}Nb_{23. 7}Zr_{4. 9}Ta_{1. 7} ) ₉₄Fe₆合金具有高强度和显著塑性，其压缩屈服强度为2425MPa，断裂强度为2650MPa，断裂应变为0. 0691，平均弹性模量仅为52GPa，接近第三代生物医用钛合金的最低值． 将所合成的超细晶钛合金与常用的两种生物钛合金( Ti-6Al-4V 和Ti-13Nb-13Zr) 进行抗摩擦磨损性能对比，发现所合成的钛合金具有最佳的耐磨性．

In order to explore an effective method to fabricate biomedical Ti alloy with high strength and low modulus,amorphous /nanocrystallized ( Ti_{69. 7}Nb_{23. 7}Zr_{4. 9}Ta_{1. 7} ) _{100 －x}Fe_x alloy powders with different Fe contents were synthesized via mechanical alloying,and,subsequently,ultrafine-grained Ti-based composites with high strength and low modulus were fabricated via the spark plasma sintering-amorphous crystallization. The results show that,during the performed mechanical alloying,Fe content significantly affects the glass-forming ability of the alloy system,concretely,fully amorphous structure forms only when x reaches 10; and that Fe content also has an obvious effect on the mechanical properties of the bulk composites,only the bulk composite at a x value of 6 possesses high strength and distinct plasticity,with the corresponding compressive yield stress,fracture stress and fracture strain respectively being 2425MPa,2650MPa and 0. 0691,and with an average elastic modulus of 52 GPa that is close to the minimum of the third-generation biomedical Ti alloys. Moreover,by comparing the friction and wear properties of the fabricated composites with those of two kinds of conventional biomedical Ti alloys ( Ti_{69. 7}Nb_{23. 7}Zr_{4. 9}Ta_{1. 7} ) ₉₄Fe₆,it is found that the fabricated composites are of the best wear resistance.